CVE-2026-27456: util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup

Overview

Severity

Medium (CVSS 4.7)

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Apr

Released

2026-04-05

Last Updated

2026-04-14

EPSS Score

0.02% (percentile: 4.4%)

Affected Products (3)

Open Source Software

• azl3 util-linux 2.40.2-3 on Azure Linux 3.0
• cbl2 util-linux 2.37.4-10 on CBL Mariner 2.0
• azl3 util-linux 2.40.2-4 on Azure Linux 3.0

Revision History

• 2026-04-05: Information published.
• 2026-04-06: Information published.
• 2026-04-07: Information published.
• 2026-04-07: Information published.
• 2026-04-14: Information published.
• 2026-04-14: Information published.